U.S. Secretary of State John Kerry will introduce liberal megadonor George Soros at an open forum on Tuesday, the latest evidence of the billionaire using his political connections to benefit his investments and foreign policy goals, critics say.

Kerry will introduce Soros at the 1:30 p.m. forum on May 13 at the George C. Marshall Center, the Germany-based security and defense studies institute jointly operated by the U.S. Department of Defense and German Defense Ministry, according to a State Department event notice.

Soros will discuss “strengthening civil society, democracy and the world economy” with Assistant Secretary for Public Affairs Douglas Frantz following Kerry’s introduction.

Soros, a New York City hedge fund manager who amassed great wealth through his company Soros Fund Management, has used his foundation network—known as the Open Society Foundations (OSF)—to dispense more than $11 billion to groups abroad as well as numerous left-leaning U.S. groups in the last three decades.